It is best to use chopped stone or burnt stone, or gravel (any marble scraps) to pave the yard. Let me tell you how to lay courtyard floor tiles:
1. Fill the sand with soil as the binding layer material for laying tiles. Note that the sand should be relatively even, and it is best not to have large agglomerates.
2. Level the sand so that ceramic tiles can be placed on it. Pay attention to removing small hard pieces while leveling. The binding layer material should be even and stable.
3. Carefully place the bricks on the base layer, making sure they are flush with the previously laid tiles, and compare them to see if there is any color difference or head size.
4. Use a rubber hammer to gently tap the tiles into position. Do not use force. If the bonding layer is uneven, remove the tiles and smooth them again.